Well-posed first-order reduction of the characteristic problem of the linearized Einstein equations

Details Well-posed first-order reduction of the characteristic problem of the linearized Einstein equations Well-posed first-order reduction of the characteristic problem of the linearized Einstein equations

2004-08-12

arxiv.org/abs/gr-qc/0408035v1

Phys.Rev. D71 (2005) 024021

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages

Scientific paper

10.1103/PhysRevD.71.024021

A choice of first-order variables for the characteristic problem of the linearized Einstein equations is found which casts the system into manifestly well-posed form. The concept of well-posedness for characteristic problems invoked is that there exists an \textit{a priori} estimate of the solution of the characteristic problem in terms of the data. The notion of manifest well-posedness consists of an algebraic criterion sufficient for the existence of the estimates, and is to characteristic problems as symmetric hyperbolicity is to Cauchy problems. Both notions have been made precise elsewere.

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